Alert archive / Colorado / Flood Watches in 2024

Flood Watch 2, NWS Denver/Boulder, CO

August 13, 202415 counties in Colorado

NWS Denver/Boulder, CO issued this flood watch at Aug 13, 2024, 10:29 AM MDT for 15 counties in Colorado. It took effect at Aug 13, 2024, 12:00 PM MDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Aug 13, 2024, 10:29 AM MDT (16:29 UTC)
In effect from: Aug 13, 2024, 12:00 PM MDT
Expired: Aug 13, 2024, 8:17 PM MDT
In force: 8 hr
Issued by: NWS Denver/Boulder, CO
Flood severity: None

Counties Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Morgan County, CO, Park County, CO, Weld County, CO

The radar

The Denver radar (KFTG), 43 km from the middle of the area, began a volume at 16:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 4.5 hours before the alert went out and 308 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 46 J/kg
Mixed-layer CIN: -185 J/kg
Mixed-layer LCL: 1235 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Denver/Boulder, CO wrote its last area forecast discussion before this flood watch went out at Aug 13, 4:37 AM MDT, 5 hours 52 minutes earlier.

Area forecast discussion, Aug 13, 4:37 AM MDT, 5 hours 52 minutes before

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Hazardous weather outlook, Aug 13, 5:55 AM MDT, 4 hours 34 minutes before

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The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 12, 6:03 PM MDT	Tornado Warning	BOU	Weld	27 min
Aug 12, 6:07 PM MDT	Areal Flood Advisory	BOU	Morgan	30 min
Aug 12, 6:22 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	23 min
Aug 12, 6:25 PM MDT	Flash Flood Warning	BOU	Elbert, Lincoln	3 hr
Aug 12, 6:30 PM MDT	Tornado Warning	BOU	Weld	13 min
Aug 12, 6:37 PM MDT	Flash Flood Warning	BOU	Morgan	3 hr
Aug 12, 6:41 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	34 min
Aug 12, 6:43 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	32 min
Aug 12, 6:44 PM MDT	Areal Flood Advisory	BOU	Elbert, Lincoln	5 min
Aug 12, 6:49 PM MDT	Flash Flood Warning	BOU	Elbert, Lincoln	2 hr
Aug 12, 6:50 PM MDT	Severe Thunderstorm Warning	BOU	Weld	40 min
Aug 12, 6:58 PM MDT	Flash Flood Warning	BOU	Weld	3 hr
Aug 12, 7:09 PM MDT	Flash Flood Warning	BOU	Morgan, Washington	3 hr
Aug 12, 7:14 PM MDT	Tornado Warning	BOU	Lincoln	16 min
Aug 12, 7:15 PM MDT	Severe Thunderstorm Warning Considerable damage threat	BOU	Morgan	45 min
Aug 12, 7:24 PM MDT	Tornado Warning	BOU	Morgan	36 min
Aug 12, 7:28 PM MDT	Tornado Warning	BOU	Lincoln	32 min
Aug 12, 7:32 PM MDT	Flash Flood Warning	BOU	Elbert, Lincoln	3 hr
Aug 12, 7:58 PM MDT	Special Weather Statement	BOU	Larimer	47 min
Aug 12, 7:59 PM MDT	Areal Flood Advisory	BOU	Larimer	2 hr
Aug 12, 7:59 PM MDT	Special Weather Statement	BOU	Morgan	46 min
Aug 12, 8:02 PM MDT	Special Weather Statement	BOU	Morgan	43 min
Aug 12, 8:04 PM MDT	Special Weather Statement	BOU	Weld	41 min
Aug 12, 8:10 PM MDT	Severe Thunderstorm Warning	BOU	Weld	50 min
Aug 12, 8:24 PM MDT	Areal Flood Advisory	BOU	Morgan, Weld	3 hr
Aug 12, 8:56 PM MDT	Areal Flood Advisory	BOU	Lincoln	2 hr
Aug 12, 9:33 PM MDT	Areal Flood Advisory	BOU	Weld	3 hr
Aug 12, 10:06 PM MDT	Areal Flood Warning	BOU	Morgan, Washington	3 hr
Aug 12, 10:19 PM MDT	Areal Flood Warning	BOU	Elbert, Lincoln	3 hr
Aug 12, 11:11 PM MDT	Flash Flood Warning	BOU	Weld	4 hr
Aug 13, 3:03 AM MDT	Areal Flood Warning	BOU	Weld	3 hr
Aug 13, 3:03 PM MDT	Flash Flood Warning Considerable damage threat	BOU	Boulder	2 hr
Aug 13, 3:23 PM MDT	Special Weather Statement	BOU	Larimer	52 min
Aug 13, 3:35 PM MDT	Special Weather Statement	BOU	Arapahoe	25 min
Aug 13, 3:44 PM MDT	Areal Flood Advisory	BOU	Larimer	101 min
Aug 13, 3:46 PM MDT	Severe Thunderstorm Warning	BOU	Douglas, Elbert	44 min
Aug 13, 3:50 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe	40 min
Aug 13, 3:59 PM MDT	Severe Thunderstorm Warning	BOU	Weld	44 min
Aug 13, 4:13 PM MDT	Flash Flood Warning	BOU	Weld	3 hr
Aug 13, 4:25 PM MDT	Severe Thunderstorm Warning	BOU	Weld	37 min
Aug 13, 4:26 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert	49 min
Aug 13, 4:30 PM MDT	Areal Flood Advisory	BOU	Elbert	3 hr
Aug 13, 5:18 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Washington	42 min
Aug 13, 5:25 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert, Lincoln, Washington	50 min
Aug 13, 5:57 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Washington	48 min

Nearby

Flood Watches in Colorado, 2024 Every flood watch in 2024

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.